Yawar Iqbal, Adnan Aslam Saleem, Anique Ahmad, Sajida Parveen Shaikh, Sarah Zafar.
Influence of Energy levels of Neodymium-Doped Yttrium Aluminium Garnet Laser on Macula after Posterior Capsulotomy.
Al-Shifa J Ophthalmol Jan ;14(4):169-75.

Objectives: To determine the frequency of increase in central macular thickness (CMT) and compare mean CMT after low and high energy levels of YAG laser after posterior capsulotomy. Subjects and Methods: This descriptive case series was done in Armed Force Institute of Ophthalmology, Pakistan from May 2013 to February 2014. One hundred-seventy eyes were enrolled and base line CMT was measured with SD-OCT. Following pupil dilatation YAG laser posterior capsulotomy was completed and cumulative energy noted. Patients were classified according to cumulative energy used (<= 80 mJ = low energy, >= 80 mJ = high energy). CMT was measured one-month post-laser. Results: Raised CMT was noted in 58 (34.1 %) cases. Mean pre-laser CMT in the low energy group was 215.11+- 6.72 +-m whereas, in high energy group mean pre-laser CMT was 215.42 +- 6.79 +-m. Mean post-laser CMT in low energy group was 215.80 +- 8.32 +-m. Mean post-laser CMT in the high energy group was 219.51 +- 10.11. Both groups had increased macular thickness compared to pre-laser levels but the frequency of raised CMT was more in the high energy group, P <= 0.05. Conclusion: Increased macular thickness is expected after YAG capsulotomy, but the severity and frequency is less when a total energy level of less than 80 mJ is used. OCT is an indispensable diagnostic tool for monitoring patients undergoing YAG capsulotomy.

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